Elimination and special-signal mechanism.



I. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM. I

I 1 APPLICATION FILED MAY 24- IQIZ. I R 1,294,704. Patented Feb. 18, 1919 I3 SHEETS-SHEE] I.

J. F.- RE'IRDON.

ELIMINATION AND SPECAL SIGNAL MECHANISM. APPLICATION FILED MAY 24. 1912.

1,294,704. Patented Feb. 18, 1919.

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I t z ATTORNEY I. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24, I912.

Patented Feb. 18, 1919.

13 SHEEIS-SHEEI 3- INVENTOR WITNESSES.

4 T ORA/E .I. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24. I912.

Patented Feb. 18, 1919.

I3 SHEETS-SHEET 4.

Q R; WITNESSES. N /II/I/E/VTOR W I BY A J. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY24.19I2.

Patented Feb. 18, 1919.

13 SHEETS-SHEET 5.

IN VE N TOR WITNESSES:

J. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY24. I912.

Patented Feb. 18, 1919;

I3SHEETSSHEE16.

I. F. REIRD'ON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24. I912.

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J. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION -FILED MAY 24. I912.

1 ,294,'704:. Patented Feb. 18, 1919.

I3 SHEETSSHEET 8.

O WITNESSES.

-INVENTOR J. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24. 1912.

Patented Feb. 18, 1919.

I3 SHEETSSHEE1 9.

'1. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISMJ APPLICATION uzn MAY 24. 1912.

1,294,704. Patented Fb.18,1 919.-

J. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24. I912.

Patented Feb. 18, 1919.

I3 SHEETS-SHEE'I ll- WITNESSES:

INV TOR 2. 2

- BY ran/v3 I. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24-, IBIZ- Patented Feb. 18, 1919.

I3 SHEEISSHEEI I2.

WITNESSES.

J. F. REIRDON.

ELIMINATION AND SPECIAL SIGNAL MECHANISM.

APPLICATION FILED MAY 24, I9I2.

Patented Feb. 18, 1919.

\3 SHEETSSHEEI l3.

IVENTOR Br "Ami/2 EV WITNESSES:

UNITED smarts PATENT orrrcn. r

JOSEPH F. REIRDON, OF KINGSTON, PENNSYLVANIA, ASSIGNOB TO THE ADDER MACHINE COMPANY, OF WILKES-BARRE, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA.

ELIMINATION AND SPECIAL-SIGNAL MECHANISM.

Specification ofLetters I'atent.

Patented Feb. 18, 1919.

Application filed May 24, 1912. Serial No. 699,576.

To all whom it may concern.

Be it known that I, JOSEPH F. REIRDON, a citizen of the United States, residing at' Kingston, Luzerne county, Pennsylvania, have invented new and useful Improvements in Elimination and Special-Signal Mecha-' nisms, of which the following is a specification.

This invention relates to calculating machines, and more particularly to elimination devices and special signal mechanisms therefor, whereby the operation of a manuallycontrolled member, as a key, sets mechanism to disable a part of the machine, and to effect the imprint of a distinguishing character to indicate that such part was disabled, at that particular operation'of the machine.

Furthermore, the invention is directed to a special sign printing mechanism to distinguish selected printed items from others in the list.

Commonly, calculating machines of the Wales type, have been equipped with eliminating mechanisms directly operated by depresslon of a key to disable a part of the machine, as the registering or printing mechanisms, prior to the operation of the main drive shaft.

The printing of a character coincidently with the operation of the usual printing mechanism to indicate that the registering mechanism was disabled during such operation is not new in this invention.

So far as I am aware, however, no means has ever been provided to print a character to indicate that the printing mechanism was disabled during an effectlve operation of the registering mechanism. The nonprint mechanism, as usually operated, prebeen registered but not printed, that the" total, when printed, will be a total ofthe amounts registered, and will not accord with the sum of the items printed. This is conv fusing, and permits the ready falsification of records, as by feeding the paper back- Wardly, after an operation of the machine a signal adjacent the first item printed after snch totaling and clearing operation, to indlcate that the machine was clear when the first item was printed. The absence of such printed signal adjacent the item at the head of the list indicates that the counters had registered some amount, prior to the registration of said first item, and consequently the operator is placed upon his guard, as the footing or total registered and printed may not be the correct total of the items printed in that column.

Another object of this invention is to effeet the imprint of said clear signal associated with the imprint of the non-print signal, when said non-print key is operated to prevent the printing of the first item set up after a totaling and clearing operation. This arrangement will determine for the operator whether the machine was clear when the first item of a list was introduced into the machine, even though said item was not printed, thereby relieving the operator of anxiety or. indecision on this point, and also preventing manipulation of the record.

In lists wherein the first item or items are registered only, and not printed, if the operation of the clear signal mechanism is suspended until the recording of the first. printed item, it would tend to confuse the operator, and would, in fact, cease to be a clear sign, under these circumstances, because by the registration of the first item or items Without printing, the register would contain one or more items prior to the imprint of such clear signal.

A further object is the provision of a novel clearsignal mechanism which is adapted to print independently of the regular item printing mechanism.

;'Another object is to improve the. means whereby the regular printing mechanism is disabled, the efi'ectiveness of the non printing mechanism being controlled by the op:

eration of the main drive shaft itself, and is in no way dependent for operation on the printing mechanism.

It is frequently desirable in listing a series of items, to designate particular or recurring items in the list, such as those relating to a certain customers account, for instance, so they may be readily distinguished from the mass of other items, and another object of this invention is to improve and simplify means for attaining this result.

In so doing, I have contrived a mechanism which can be used for the purpose of positioning other than signal types, relatively to the printing line.

A still further 0 ject of this invention is to improve the non-add mechanism, whereby the registering mechanism is disabled, the non-add mechanism being set by a manually-operable member, as a key, and subsequently shifting to effective position by the operation of the main drive shaft, thereby making the key touch easier and relieving the operator of the necessity for manually shifting the non-add mechanism to effective position. This object is also attained in the non-print and special signal mechanisms.

In order to designate such non-added or unaccumulated items on the printed list, it is customary to provide means whereby a signal is printed adjacent said items, and another object of this invention is to improve the mechanism by which this result is accomplished.

Heretofore, it has been customary to so arrange the non-add mechanism, that the total and clearing mechanism could not be operated if the non-add key was depressed, and vice versa.

A further object of this invent-ion is to improve and simplify the means whereby the non-add mechanism is locked out of operation when the total and clearing mechanism is set, the non-add mechanism being arranged to be released from set position by the depression of the usual total key, thereby preventing any interference with the operation of the registering mechanism in the usual operation of taking a sub-total, or of taking a total and clearing the machine.

Still another object of this invention is to arrange the several special manually-operable members, or keys, on the keyboard subject to the control 'of the usual keycontro-lling devices, and to place a type carrier common to all, and having the several type characters mounted therein, under the control of any of said keys.

It is customary in some calculating machines to provide mechanism to lock the depressed keys in actuated position and the remaining keys against actuation, to prevent this nature to'coiiperate with the special manually-operable members.

Other objects and advantages will be set forth hereinafter, and particularly pointed out in the claims.

In the accompanying-drawings, Figure 1 is a side view, showing one embodiment of my invention applied to the well-known Wales adding. and listing machine.

Fig. 2 is a. plan view.

Fig. 3 is a side view, illustrating one form of mechanism to prevent the imprint of an item, and known as the non-print mechanism. This view also shows a means whereby a signal is set to print during the operation of the registering mechanism, said signal mechanism being in idle position, parts being broken away, and omitted.

Fig. 4 is a similar view, illustrating the position of the mechanism when the nonprint key is depressed, the main drive shaft having started on its forward stroke.

Fig. 5 shows the means for setting the member which disables the printing mechanism.

Fig. 6 is a detail perspective of the dis abling member for the regular printing mechanism, and its shifter.

Fig. 7 is a view of the left-hand side of the well-known Wales adding and listing machine, showing the totaling and clearing mechanism which controls the setting of the clear signal mechanism. The totaling and clearing mechanism is shown in the act of setting the clear signal mechanism, the drive shaft being on its return stroke.

Fig. 8 is a similar view, showing the positions of the parts, when the clear signal is set, the drive shaft having returned to initial position.

Fig. 9- is a detail perspective of the connection between the totaling and clearing mechanism, andthe clear signal mechanism.

Fig. 10 is an enlarged detail view, showing a means to effect the imprint of the clear sign adjacent the imprint of the nonprint sign, the mechanism being shown in idle position.

Fig. 11 is a similar view, showing the clear signal mechanism set for operation, as in Fig. 8.

Fig. 12 is a similar view, showingthe means which disables the regular printing mechanism, in effective position, with the clear signal about to be printed, parts being omitted.

Fig. 13 is a detail perspective of a switch controlled by the non-print mechanism to effect the tripping of the clear signal mechanism.

Fig. 14 is a perspective of a stop to prevent depression of the non-print and other keys, in the same bank during the operation of the drive shaft.

Fig. 15. is an enlarged detail side view, showing a key-locking and signal-positioning mechanism controlled by the special signal keys, the mechanism being at rest.

Fig. 16 is a detail, illustrating the manner of tripping the key-lock, and also of operating the connection between the non-prlnt or elimination key and the detent which normally holds the disabling member for the printing mechanism idle.

Fig. 17 is a view similar to Fig. l5, showing the key-locking and signal positioning mechanism tripped.

Fig. 18 is a perspective of a means to restore the key locking mechanism to idle position. i

Fig. 19 is a side view, showing a keycontrolled mechanism to print a special signal adjacent any desired item.

Fig. 20 is an enlarged detail side view of another elimination key to control the registration of items, and known as the non-add key, the key being shown depressed to ad just the mechanism to set position, parts being omitted.

Fig. 21 is a somewhat similar view, showing the non-add mechanism locked in operative position and about to be tripped to per-. mit it to return to idle position.

Fig. 22 is an enlarged detail of a part of v the non-add mechanism, shown about to return to idle position.

This invention in so far as it relates to non-printing mechanisms constitutes an improvement upon the patents to Wales, 902,125, issued October 27, 1908, and to Mc- Farland, 924,264, issued June 8, 1909.

In so far as the invention relates to nonjust as it is add mechanisms, it is an improvement on the patent to McFarland, 880,159, issued February 25, 1908.

In so far as the invention relates to clear signal mechanisms, it constitutes an improvement on patent to Wales, 940,758, November 23, 1909,

Reference is also made to patent to Mc- Farland, 842,232, January 29, 1907, illustrating a totaling and clearing mechanism; McFarland, 874,107, December 17, 1907, illustrating a repeat key mechanism; Mc- Farland, 940,708, November 23, 1909, showing a locking keyboard, and to Wales, 794,205, July 11, 1905, and 797,032, August 15, 1905. Features briefly referred to here inafter are more fully disclosed in the abovenamed patents.

The invention is illustrated as applied to the well-known VVa-les type of calculator, in which 1, (Figs. 1 and 2) indicates the side system is used, (Fig. 2), with their stems projecting through a key-plate 3 (Figs. 1 and 15), and connected each to one end of their respective levers 4, the opposite ends of which levers carry stops 5, arranged in rows corresponding to the rows of keys and projectable through a housing 6.

The registering or accumulating mechanism includes a series of drive members or racks 7, arranged in line with the rows of stops 5 and supported on front and rear arms 8 and 9, swinging on cross shaft 10 and cross rod 11, respectively, mounted in the side frames 1. Springs 12 (Fig. 5) tend to propel said drive members toward the stops 5, but are normally prevented from so doing by a restraining and restoring bail 13, held in arms 14 carried on a rock shaft 15, to contact the forward arms 8 and hold the drive members retracted. A crank 16 having a cam slot 17 connects the rock shaft with an arm 18 fast on the main drive shaft 19. Thefree end of said arm 18 traverses the cam slot to rock the bail 13 relatively to the drive members, and normally holds the bail in effective position against the supporting arms 8. Counters 20 are individually rotatable on an axle 21 mounted in arms 22 pivoted at 23 to the side frames 1 and supported out of engagement with the drive members by props 24 connected to the arms at 25. The lower ends of said props are slotted and rest upon a trip rod 26 carried by arms 27 loosely mounted on shaft 10. Links 29 connect the trip rod 26 with the main drive shaft 19. A pinion 30 is fast with each counter to turn the same.

In an adding operation, depression of the desired keys 2, projects stops 5 into the paths of their coacting racks 7, the stops being held in, effective position by well-known means, not shown. 1

The drive shaft 19 is then turned forwardly by a handle 32, for instance, to cause the arm 18 to traverse cam slot 17 and swing the crank 16 to withdraw the restraining and restoring bail 13 and permit the springs 12 to advance the drive members or racks 7 forwardly until arrested by the stops 5, or by the usual detents 31 which overlie the several series of stops, and arrest the drive members to prevent a registering operation thereof when not: displaced by the projection of a stop in that series. The main shaft 19 on its forward stroke also swings the trip rod 26 forwardly, through links 29 to withdraw the props 24. Supports or legs 33 connected to the axle 21 contact rests 34 on the side frames as the props are withdrawn,

to hold the counters idle while the racks are being advanced, said supports having slotted links 35 connected thereto. The ends of the trip rod 26 travel in the slots until after the racks have been arrested, whereupon the rod strikes the outer ends of said slots to trip the supports 33 off the rests 34 and allow the counters to descend to mesh the pinions 30 with their respective racks 7 as the main drive shaft approaches the end of its forward stroke. Springs 28 connected to the props 24 are tensioned by the outward or forward travel of the trip rod 26, to insure an immediate engagement of the pinions 30 and drive racks 7 when the supports 33 are tripped.

Releasing the handle 32, when the drive shaft 19 reaches the end of its forward stroke, enables the usual restoring springs (not shown), to return the shaft and its connected parts to normal position. The arm 18, during such return, rocks the crank 16 and its rock shaft 15 to press the restoring bail 13 against the forward arms 8 of such racks as have advanced until arrested by the stops 5, to return them to normal retracted position. The racks, as they return, rotate the counters to register thereon the amount set up on the keyboard. The trip rod 26 also swings the props 24 toward initial position, and after the racks have been restored, said props are raised by the trip rod to effect the disengagement of the counters from the racks and lift the supports 33 into line with their rests 34, so that the machine is ready for another operation.

The regular printing mechanism includes arms 36 (Figs. 5 and 7) fast with the rear supports 9 of the drive members, (Fig. 2), and links 36 connect arms 36 with type carriers 37, having types 38, so that the advance of the drive members 7 positions the types 38 relatively to the printing line on a platen 39. Devices to impress said types on the paper include spring-driven hammers 41 (Figs. 5 and 7) journaled on a rod 73 and normally held retracted by individual latches 180 and by a catch 40 common to all the hammers. Spring-pressed trip bars 181 tend to displace the individual latches, but are normally held idle by lugs 182 thereon which contact the lever arms 36. If a detent 31 lies in the path of a drive member, the lever 36 is not raised sufficiently to enable the trip bar to become effective, and the individual latch holds its hammer against operation, whenthe catch 40 is withdrawn in the operation of the machine.

The positioning of the types 38 relatively to the printing line by the levers 36, effects the release of the individual latches by freeing the corresponding trip bars to the action of their springs 183 and as the main drive shaft 19 approaches the end of its forward stroke, the catch 40 connected therewith by a linkage, not shown, is lifted to release the hammers wghich strike a series of plungers or firing pins 42 to drive them against the rear ends of the types 38 lying opposite the printing line, and effect the .impression of the types against the paper. A bail 43 (Figs. 10, 11 and 12) restores the hammers to cocked position, on the return stroke of the main drive shaft, where they are held by, the catch 40 and latches 180, the trip bars 181 having previously been retracted by the retirement of the racks or drive members 7.

The foregoing mechanismis the wellknownNVales' printing means which is more fully shown and described in the atents above referred to and particularly in Patents Nos. 794,205; 902,125 and 924,264. Fun

thermore, said mechanism is similar to that to be hereinafter disclosed in referring to the signal printing mechanism.

To take a total and clear the machine, a total key 44 (Figs. 7 and 8) is depressed. This key rocks a set lever 45, 45 fast on shaft 10, the opposite end of which shaft carries similar set leverhaving an arm 46 (Fig. 1) corresponding to arm 45. Slotted links 47 connect arms 45 and 46 with the legs or supports 33 and when said arms 45, 46 rock forwardly, said links swing the legs or supports out of line with. their rests 34.

The main shaft, on its forward stroke, swings the trip rod 26 which travels in a descending arc, thereby lowering the props 24 and (the legs being disabled), the counters are engaged with the racks at the outset of the forward stroke and prior to the release of the racks. A connecting bar 48 (Fig. 8) joined to arm 45 by a pin and slot connection 48 is shifted as the arm is rocked by the depression of its key, to bring a cam edge 49 on said connecting bar against a crank 50 on a shaft 51 to rock said shaft and displace said detents 31 in the wellknown manner.

The rack members 7 when released are thus free to advance until arrested by the zero-resetting devices in a manner set forth, for instance, in Patent 842,232 above referred to, and not herein shown. This operation not only returns the counters to zero, but positions types 38, corresponding to the total displayed by the counters just prior to the totaling and clearing operation, which total is rinted in the usual manner as the main drive shaft approaches the end of its forward stroke. A locking means 52, on the drive shaft 19, indicated in Figs. 7 and 8,

beneath shoulders 55 on thrust bars 56 joined at 57 to resetting levers 58, pivoted on rod '11. The thrust bars rest u on pins 59 on the props 24. When, in a tota ing and clearing operation, the props are lowered to connect the counters 20 and their drive members 7, the thrust bars follow, until arrested by contact with the studs 54. The restoration of the arms 45 and 46 by the spring 53, aided, it may be, by a cam (not shown) on the locking means 52, forces the studs 54 against the shoulders 55 of the thrust bars to press them backwardly and rock the resetting levers 58. The arms 60 of said levers 58 engage the legs or supports 33, or projections 61 thereon, to disengage the counters from their drive members while the latter remain advanced. Springs 62 return the legs into line with their rests 34 and during the return of the trip rod 26 and props 24, pins 59 displace the thrust bars relatively to the studs 54, to relieve the resetting levers and permit them to drop back to idle position out of the paths of the projections 61 on the legs or supports.

A clear signal mechanism is provided to print a sign adjacent the imprint of the first item introduced into the machine, after a totaling and clearing operation, such clear signal mechanism being set to operate, and thus controlled, by the devices operated in taking a total and clearing the machine. One of the resettin levers 58 has aloose connection 64, Figs. 8 and 9, with a crank 65 on a rock shaft 66 journaled in the side frames. An arm 67 fast on said shaft has a pin 68 entered in a slot 69 in a link 70 joined to a connecting member or coupler 71 (Figs. 10, 11 and 12) pivoted toa hammer 72 journaled on rod 73 adjacent the other hammers 41. A bar 74 on which the keeper 40 is hinged, passes through a slot 75 in the hammer 72 to arrest it on its firing or percussion stroke. The units hammer of the regular printing mechanism carriesa lateral projection 76 normally idle, as in Fig.

10, wherein the projection is shown in dotted lines above the coupler 71, the pin 68 lying at the upper end of the slot 69 in link 70. When the resetting lever 58 is rocked by its thrust bar 56, just after the printing of the total, it turns the crank 65 and shaft 66 and raises arm 67 and its link 70 to bring the coupler 71 into the path of the setting projection 76. As the hammers of the regular printing mechanism are reset bythe bail 43 in the usual manner (not shown), the projection 76 presses against the coupler to set the clear signal hammer 72 and retain it in cocked position against the tension of its spring 63 as long as the units hammer remains cocked. When the thrust bar 56 is tripped to relieve the resetting lever 58, the

A latter returns to normal position and restores the rock shaft 66 and arm 67 to position the pin 68 at'the lower end of slot 69 (Fig. 11) to enable the coupler to drop back to idle position after the clear signal ham mer is fired, and thereby prevent resetting of said hammer until another totaling and clearing operation is performed.

Upon the next effective operation of the machine, whereby an item is printed, after a totaling and clearing operation, the units hammer is tripped and carries the setting and retaining projection 76 away from the coupler 71, thereby releasing the clear signal hammer 72 to the action of its spring 63. The hammer 72 strikesa plunger or firing pin 42 to drive a type carrier 77 pivoted at 8 and carrying a signal type 79, against the platen.

The foregoing construction is old and I only constitutes part of the present invention in so far as it is combined with the new parts now to be set forth.

Means has heretofore been provided, as illustrated -in patents to Wales 902,125, October 27, 1908, and to McFarland, 880,159, February 25, 1908, to disable the printing and registering mechanisms, respectively, at the will of the operator, and British Patent #23558 of 1909 shows a mechanism for printing a character adjacent any item which has been printed but not registered, to indicate the fact that the registering mechanism was disabled when such item was printed.

The present invention is directed to improvements on and extensions of these ideas, whereby signs may be printed with or without the imprint of items set up on the keyboard, to indicate any special condition of the mechanisms atany particular operation. For example, when the printing mechanism was disabled, no provision was made for indicating such fact on the paper, when the machine was operated, and, by manipulation, the machine might seemingly be made to add incorrectly. To enable one at a glance to determine whether the total of a list includes non-printed items, and also to render easy, the detection of improper manipulations, involving the non-print or elimination mechanism, means is associated with the non-print mechanism to effect the imprint of a special sign or character to indicate that the regular printing mechanism was disabled during that operation of the machine.

vided to hold the key depressed during a single operation, and to prevent the depression of more than one key in the same row or bank, such locking means being held in idle position by a latch which is tripped by the key, and is returned as the machine completes an operation, to release the key and enable the latch to become effective.

Furthermore, means controlled by the operation of the machine, is provided to prevent the depression of the non-print or any other key in the same bank, after starting and during anoperation of the machine.

Said non-print key controls a special or auxiliary printing mechanism, including positioning mechanism independent of the regular printing mechanism and whereby, during a non-printing operation of the machine, a signal type is brought to the printing line, and an impression device tripped to print said type to indicate the disabled condition of the machine.

Referring more particularly to Figs. 3, iand 5, and especially the latter, the means which disables the regular printing mechanism comprises, inthe present instance, a comblike, horizontally disposed detaining plate 80, carried by upwardly extending arms pivotally supported at 81 adjacent the trip bars 181.

The trip bars release the individual hammer latches 180, as the type bars 37 are positioned by the levers 36, as heretofore explained, said trip bars being provided with lugs or stops 86 normally located opposite and below the paths of the teeth of the comblike detaining plate 80. A spring 82 tends to maintain the'plate 80 in idle position.

Obviously if the plate 80 is swung rearwardly to interpose its teeth ,85 above the lugs 86, the trip bars cannot rise to release the individual hammer latches even thou h the type bars are positioned relatively to t e platen in accordance with the values of the depressed keys 2, and no printing would occur.

To effect this result, I provide a shifter or thrust bar 83, for the detaining plate 80, such thrust bar being slotted near its rear end to embrace a rod 84, for guidance, and extending forwardly to an arm 90 on the cross shaft 89 journaled in brackets (Fig. 1) on the side frames 1.

lever 98, to rock the rear end of the lever A spring 87 superior to the spring 82 is connected at one end to a rocker 88 fastened to the rock shaft 89, the opposite end of the spring being connected to a link 99 extending upwardly from the tail of a detent 91 journaled on the rock shaft 89. The upper end of the link loosely engages one end of a lever 98 pivoted in' the keyboard (Figs. 3, 4 and 5) the opposite end of which lever lies beneath a projection or offset 96 on the stem 97 of a special or non-print key 95 projecting through the keyboard 3.

Depressing the key or manually-operable member 95 forces the offset 96 against the upwardly and lift the link 99, thereby tensioning the spring 87 to turn shaft 89 and rock the arm 90 rearwardly. This in turn thrusts bar 83 rearwardly, its rear end swinging the comb plate 80 against the tension of its spring 82, to interpose the teeth 85 of the comb in the paths of the lugs 86 on the trip bars and thus prevent the latter from releasing the individual hammer latches 180.

The detent 91 (Fig. 3) normally operates to hold the thrust bar or shifter 83 against operation, to which end, the detent 91 terminates at its rear, in a hook 91 adapted to take over a stop 92 on a stop bar 93, whose forward end is connected to an arm or crank 94 fast on the rock shaft 89, the rear end of the stop bar being slotted to embrace the guide rod 84.

With the detent in effective position, the rock shaft 89 cannot turn clockwise in Which direction it is urged by the spring 87, owing to the crank 94, stop bar 93 and stop 92. Consequently, the thrust bar 83 is held idle.

Depressing the special key 95 further tensions spring 87, but positively rocks the detent 91 (Fig. 4) so that upon its release of the stop 92, sufficient tension has been stored in drive spring 87 to snap the comb plate 83 rearwardly to effective position.

The shifter is further detained, however, by the contact of arm18 of the main drive shaft19, with the rocker 88 of said rock shaft (see Fig. 3), sothat depression of the non-print key 95 unlocks the detent 91 only, and the disabling device 80 is held idle until the main drive shaft starts'on its forward strokle, whereupon the detaining arm 18 releases therocker 88 (Fig. 4) to enable the spring 87 to rock its shaft 89 and press the shifter against the detaining plate 80 to throw the latter to effective position.

Depression of the spring-restored key 95 also presses its shoulder or offset 96 against the tail 104 of a spring latch 102 pivoted. at 103, to trip said latch and thereby release a lock plate 100 mounted to slide beneath the key-plate 3 and bearing a keeper 101 to engage the offset 96 and lock the key in operated or depressed position. A spring 105 tends to shift the lock plate to effective position. The keeper 101 is recessed or undercut as at 101 (Fig. 17) to fit over the offset 96-, the lock plate being arrested by contact of the inner end of therecess with the key stem or shoulder.

The tooth 91 of the detent 91 is of such length as to maintain its engagement with the stop 92, until the key 95 has nearly reached its limit of movement, to insure the operation of the key locking mechanism and thus tend to prevent improper manipulation.

The key 95 is freed from its keeper 101 as the main drive shaft 19 on its return stroke brings a stud 106 on an arm 107 (Fig. 7) fast on the main shaft, against a releasing har 108, to effect the release of the numeral keys 2, 2, as in the usual Vales type of ma chine. Said releasing bar carries a tappet 109 to strike a finger 110 on a cross s aft 111 to rock said cross shaft and with it a crank 112 (Fig. 18) thereon. Said crank enters a slot in the lock plate 100 and when the cross shaft is rocked, said crank restores the late to normal position where it is held by the spring latch 102. f

The restoration of the plate withdraws the keeper 101 from the non-print key 95, which at once returns under the influence of its spring and restores the lever 98 independently of its link 99, through a pin 113 on the stem 97, (Figs. 4 and 16 The detaining plate 80 remains effective until the arm 18 on the main drive shaft depresses the rocker 88 (Fig. 3), to Withdraw the shifter 83 as well as the stop carrying bar 93, whereupon the link 99 is drawn downwardly through the spring 87 connect-' ing it with rocker 88, and snaps the detent 91 behind the stop 92 to hold the disabling mechanism idle during the ordinary registering and listing of items, and-spring 82 withdraws the detaining plate.

A stop plate 114 (Figs. 1 and 1 4) prevents depression of the non-print key 95 from the time the main drive shaft starts on its forward stroke until it completes its return stroke, which is to say, during an operation of the machine. This plate is slidingly mounted on studs 115 onthe side frame 1 and carries a stop 116. 'A' stud 117 on the usual full stroke segment 118 fast on the maindrive shaft 19, bears against a 'finger 119 on the stop plate when the main shaft is at rest, to normally hold the stop 116 out of the path of the key stem 97 or of the projection 96 thereon. Turning the drive shaft 1 on its forward stroke, withdraws the stud 117 and frees the stop plate to the action of a spring 120, which shifts the stop 116 into the path ofthe key stem 97- to lock the latter against depression; As the main drive shaft completes its return stroke, the stud 117 contacts the finger 119' to restore the.

stop plate to idle position (Fig. 1).-

The elimination or non-print key 95 also controls the adjustment of, a special sign printing mechanism to effect the imprlnt of a character on the operation of the machine,

its arrest by the stem of the depressed elimination or non-print key.

Such forward throw of the locking plate determines the distance through which a positioning bar 121 may advance, the front end of which bar confronts the rear end of the lock plate 100, and is slotted to embrace a guide stud 122. The rear end of said positioning bar is pivoted to an arm 9 of alever 36 journaled on rod 11. A link '36 connects said lever 36 with a special type carrier 37 similar to the regular type carriers 37 and bearing aspecial type 38 to indicate a non-print or eliminating operation. This special type carrier preferably lies between the regular-units type carrier and the clear signal type carrier 77 (Fig. 2).

The bail 13 contacts the positioning bar 121 to restrain in advance thereof under the.

propelled against stops 5. It will be seen that the lock plate serves also as an arrester for the positioning bar, and hence will be referred to as an arrester when its positioning function is under discussion.

An impression device similar to those of the regular printing mechanism, eflects the imprint of the special type 38, and comprises a hammer 11 pivoted on 'rod73 anddriven by a spring 184i against a plunger or firing pin 42' (Fig. 12), with which the type 38 alines when in printing position. The universal resetting bail 4:3 cocks said hammer 4:1 at the same time that it cooks the-regular printing hammers 41, and the catch 40 (Fig. 2), holds it in cocked position- An individual latch 180" similar to theindividual latches of the regular printing mechanism holdsthe-hammer 41 normally idle, said latch being displaced by a trip bar 181 similar to the regular trip" bars and under the influence of its'spring 105, before driven by a spring 183 against the tail of said latch. A lug 182 on the trip bar con-. 

